Lighting device



FIG. 1 is a top, left, and front perspective view of a lighting device showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dashed broken lines in the Figures show portions of the lighting device that form no part of the claimed design. 

CLAIM The ornamental design for a lighting device, as shown and described. 